Safety control mechanism for a wire stitching machine



A. F. FISCHER April 30, 1940.

SAFETY, CONTROL MECHANISM FOR A WIRE STITCHING MACHINE 3 Sheets-Sheet 1 Filed June 20, 1939 BUM/M44 4,

AP 1940- A. F. FISCHER 2.199286 SAFETY CONTROL MECHANISM FOR AWIRE STITGHING MACHINE Filed June 20, 1959 3 Sheets-Sheet 2 l a; 47 i 54 flFE'saher i u Woe/M1134 3- Sheets-Sheet 5 Qwuwvtow JZEFz'aoher X iilvlll wfl II!. -11-.. 5 H V A. F. FISCHER SAFETY CONTROL MECHANISM FOR A WIRE STITCHING MACHINE Filed June 20, 1939 M ///////w ////m///// M a V w J a a u/ q .ffl K Q I W/H/U/ /A J -Ln n A April 30, 1940.

VII/ll/l/A 3 9' PatenteldiAypr. 30, 194 I v r V NITED STATES" PTENT orrics SAFETY CONTROL MECHANISM FORiA WIRE STI'ECHING MACHINE Arnold Ferdinand Fischer, Bronx, N. Y., assignor to Mince Products Corporation, New York, I N. Y., a corporation ofNew York Application June 20, 1939, Serial No. 280,200

14 Claims. (01. 1--2) This invention relates to wire stitching mameets with an obstruction when said elements chinesof that type including a stitching head are movingto staple forming and driving posihaving as'parts thereof staple forming and drivtion's. ing elements operated to staple forming and driv- The invention further aims to provide, a safe- 5 ing positions to respectively form and drive a staty control mechanism for correlation with the 5 ple in the manner as set forth in my co-pending elements aforesaid and acting automatically applicationSerial No. 199,701, filed April 2, 1938, when an obstacle, suchas the hand of an atwhich has matured into Patent No. 2,179,036 tendant is interposed in the downward path of granted Nov. 7, 1939, but more particularly to a a vertically movable part of said mechanism to safety control mechanism for correlation with thereby prevent the completion of the staple 10* the said staple forming and driving elements. forming and driving strokes of said elements The invention resides in theprovision on the W h discontinuing h op r n of e p stitching head of the machine or" asafety control ating means o e latter and the Operating mechanism acting to automatically latch the means for the machine with which the Sa y staple forming and driving elements from com- 11 1 echanism is associated. 15"

plating their staple forming and driving strokes The invention further aims 130 p in a on the interposition of an obstacle in the path of manner as r er set forth, a Safety a part of said mechanism, and'without disconl mechanism r the p p set forthywhioh tinuing the erati n of th ()perating means is comparatively simple in its construction and for saidelementsor the operation of the machine arrangement, Strong, durable, p thOT- 20 with which the stitching head is associated. s y efiioient in items, readily i lled wit The invention resides in the provision on the respect to t Staple forming and driving stitching head of the machine of a safety control merits of a stitching heed employed in a Wire "inech'anism acting to automatically latch the sta- Stitching machine, d y assembled, and comple forming and driving elementsfrom cOmplets v v inexpensive to Set up. 25

ins their staple forming and driving Strokes on i vi g the aims aforesaid and others the interposition of an obstacle in the path of a Whlch may heremaftel appeal, the inventlon part of Said mechanism, and Without disconconsists of the novel construction, combination finuing t Operation of the operating means f and arrangement of parts as will be hereinafter :said elements orthe operation of th machine more specifically referred to and illustrated in the 0 with which the stitchinghead is associated, and panying drawings, wherein is shown an it i mechanism including means for autoembodiment of the invention, but it is to be unmatically releasing said elements when the opdersiood that changes, variations a d odifieratin me for th l tt t t restore said cations may be'resorted to which fallxwithin the e1ements to their normal position. Scope of the W as claimed' 35 The invention further aims to provide a safety the dltawmgk control mechanism for correlation with staple Flgure '1 1S a fmnt elevatlon of the staple form forming and driving elements and acting to auto g nd driving elements of a stitching. head of matically arrest the completion of the staple a sthplefolming and d v g machine and show- 4- forming and driving strokes of said element when ing the adaptation therewith of a safety control said mechanism meets with an obstruction. mechanism in accordance With this invention, 7

The'invention further aims to provide a safety Figure 2 is a Side, elevation p y in ec on Of control mechanism for correlation with the ele e S 'HCtHreJShOWII in Figure 1, merits aforesaid and including a vertically mov- Figure 3 is a Vertical Sectional V w O t e 5 able part acting when meeting with an obstruc- Structure ShOWII in Figure 1, I i

ticn to provide for said mechanism arresting the Figure 4 is a section on line l t, Figure 1, con'ipletion of the staple forming and driving vFigure 5 is a view similar to Figure 4 illustratstrokes of said elements, and with the arresting ing a latch correlated with the staple driving eleof said strokes being had without the discontinment in released position, 0' uing of the operating means for said elements; Figured is a section on line 66 Figure l,

' The invention further aims to provide a means Figure 7 is a rear elevation of the staple formior correlation with the staple forming and driving element with the driver therefor omitted, ing elements aforesaid for automatically arrest- Figure 8 is a rear elevation of the driver for ing the completion of the staple forming and the staple forming element. fdrivingstrokes cfsaid elements when said means Figure 9 is a section on line 99 Figure 1, 55

Figure 10 is an exploded view, broken away of the driving member and driver member or hammer of the staple driving element, and Figure 11 is a section on line I of Figure 1.

With reference to the drawings A and B indicate respectively reciprocatory staple forming and driving elements which form parts of a stitching head of a staple forming and driving machine. and as is well known the element A has its staple forming stroke acting in advance of the staple driving stroke of the element B. These elements are correlated in a manner whereby element B will reciprocate within the front of the element A and this arrangement is also well known. The said elements A, B are arranged in an opening C formed in the front of the body D of the stitching head, and as is well known a front plate, such as is shown in my application aforesaid is employed for closing opening C.

The element A, as shown is of substantially bar-like form and includes a front groove I in which element B is to travel and this arrangement is well known. The element A in the upper portion of its back is formed with a channel 2 (Figure '7) which opens at the upper end and at the rear of element A. The channel 2 is of less length than the length of element A and has its side walls (Figure 9) formed with lengthwise aligned grooves 3. The element A above and in "proximity to the bottom of channel 2 is formed with a transverse opening 4 (Figure 6) having its ends at the sides of said element. The opening 4 is of squared contour and arranged rearwardly of the groove I. The rear side of the opening 4 is intersected by the channel 2 (Figure 6). The element A on one side thereof above and in proximity to its staple forming jaws 5 is formed with a laterally extending lug 6. The element A includes an actuating or driving member I of the form shown in Figure 8 and which is slidably mounted in and is of less length than the channel 2. The member has its sides formed with tongues 8 which are slidably mounted in the groove 3 (Figure 9).

The element B as shown is of substantially bar-like form and includes a driving member 9 for and which is coupled at its lower end to the upper end of the staple driver member or hammer ID (Figure 3). actuating head therefor. The head II is formed in its front with a vertical channel I2 (Figures 4 and 5) in which is arranged the member 9. The latter at its upper end is formed :With rearwardly extending right-angularly disposed lug I3 (Figure 6) and in its rear edge, directly below the forward end of the lug I3 is provided with a squared groove I5 opening at'the side and rear edges of the member 9. The side walls of channel I2 are formed lengthwise thereof with aligned grooves I6 in which are slidably mounted tongues I'I carried by the sides of the member 9. The head II (Figures 4 and 5) is formed with a transverse opening I8 having its front side intersected by the channel I2. The head II in one side is formed with a vertical guide groove or opening extending from end to end thereof and of squared contour. The open- 4 ing I8 is intersected by the guide opening. Slidably mounted in the guide opening is. a vertical plunger 29 having its head 2| enlarged to prevent the plunger from dropping through the opening. The plunger 29 in proximity to one end and in its inner side is formed with a cavity 22 having a beveled lower wall 23. Thehead portion 23 of the cavity 22.

The element B includes an is normally releasably connected with the member 9 by a horizontally arranged spring controlled latching pin 24 slidably mounted in the opening I8. The pin 24 is formed at its front with a vertical cut-out or groove 25 of a width to permit for the pin 24 clearing the member 9 for a purpose to be referred to. The controlling spring for the pin 24 is indicated at 26 and it is arranged in the opening I8 between the pin 24 and a closure 21. The pin 24 when in normal position extends into the cavity 22 and has a beveled surface 28 which seats on the beveled wall When the pin 24 is in normal position it extends through the groove I5 and the member 9 of the element B whereby the latter is latched to the head I I. The plunger 29 is employed for shifting the pin 24 from its position as shown in Figure 4 to the position as shown in Figure 5 whereby the head II is disconnected from the member 9 and the head is capable of reciprocating independently of the member 9 and this will be hereinafter referred to, especially in connection with the operation of the plunger 20 to release the head relative to the member 9. The head I I has supported on its rear face a roller 29 which is mounted in a link 39 carried by a pin 3| (Figure 2), suspended from a cam disc 32 carried by a driving shaft 33 therefor.

There is arranged within the opening C and disposed between one side of elements A, B and a wall of opening C a controlling element E which constitutes a combined guide and abutment, as Well as a controlling means for the staple forming element A and which provides the latter as a controlling means for the staple forming element B. The element E comprises an elongated bar 34 terminating at its lower end in a rightangularly disposed foot piece 35 arranged below the elements A, B and provided with an opening 36 for the passage of the element B and the staple. The opening 36 constitutes a guide for a staple and staple driver. The foot piece 35 is for arranging over the work, not shown, to be stapled. The bar 34 bears against the sides of elements A, B and depends below the jaws 5, as well as being slidable in unison with elements A, B and is suitably held in such position. The bar 34 is.

formed lengthwise thereof with an elongated cutout 31 opening at that side of the bar 34 which ears against the element A. Arranged within, lengthwise of and bearing against the upper end wall 38 of the cutout 37 is a short bar 39 which functions as a combined abutment, holder, guide, coupler and socket forming element and which will be hereinafter referred to as element 39. The latter is formed lengthwise thereof with a socket 39 opening at its lower end. Arranged within socket 39 is a coiled urging spring 49, which bears on the upper end of a plunger 4| extending into socket 39 The plunger 4| has its lower end permanently bearing against the lower end wall 42 of the cutout 31. The element 39 between the base of the socket 39 and its upper end is formed with a cutout 39 into which permanently extends the lug 6 carried by the element A. The lug 6, cutout 39 element 39 and spring urged plunger 4| correlate to couple the bar 34 with element A whereby when the latter is moved downwardly bar 34 will be carried therewith. The element 39 and spring 49 correlate to provide for the urging of the plunger 4| downwardly to permanently maintain the later in bearing engagement with respect to the wall 42 of the cutout 31. The element 39, spring 49 and 1 includes a horizontally creases in thickness from The gradually increasing plunger 4| correlate with the bar 34 to normally maintain the foot-piece 35 in extended relation the desired distance below the ends of the jaws 5. The element 39, spring 'and plunger 4| correlate to provide for the resetting of bar 34 after an obstacle in the downward path of the foot-piece 35, which arrests the downward travel of the latter has been removed from such path. The bar 34 above the cutout 31 and on the side thereof opposite the side in which the cut-out flat bottom wall 46. The cavity 44 is arranged opposite and has its lower portion arranged below the bottom wall of cutout 43. The bevel wall 45 of the cavity 44 is arranged below the upper Wall of cutout 43.

Arranged within the opening 4 is a latching pin 41 normally providing an abutment for actuator or driver 1 to provide for the downward stroke of element A. The pin 41 (Figure 1) has one end formed with a beveled upper corner 48 and at its other end with a beveled lower corner 49. The rear face of the pin 41 (Figure 6) is formed with a vertical cut-out 50. The pin 41 is arranged above the bottom of the channel 2. The pin 41 is adapted to be shifted laterally to ex.-

" tend into the cavity 44 and when so shifted the cut-out 50 will permit of the driver member 1 travelling downwardly independent of the element A. A means is employed for shifting the pin a 41 to an extent toprovide for the separation .of "the driver 1 from and whereby the driver is operated independently of element A when the staple forming stroke of the latter has been arrested. The said means include an extendible controlled normally latched shifter52 normally positioned clear of the beveled corner 49 of the pin 41. The shifter 52 is slidably mounted in the body D of the stitching head (Figure 2) and is formed intermediate its ends with a peripheral groove 53. The controlling spring of the shifter f 52 is indicated at 54. The shifter 52 is disposed atright angles to the pin." and is normally held in retracted position by a combined latching, releasing and limiting structure correlating with the groove 53 thereof. The said structure disposed oppositely rotatable rock shaft 54 supported by the machine body and disposed at right angles to the bar 34, an oppositely arcuately movable substantially segment-shaped latching, releasing and limiting cam 55 depending from the rearend of the shaft 54 and which has its lower portion permanently arranged in the groove 53, an upwardly directed crank arm 51 at the rear end of shaft 54 and a roller 58 at the upper end of arm 51 travelling against the edge of disc 32. The forward end of shaft 54 is cutaway to provide-a flat surface 59, diametrically thereof which normally bears against the edge 55 of bar 34 above the cutout 43. The coaction of the surface 59 and edge 60 normally prevents the rotation or rocking of the shaft 54 counterclockwise. A spring urged plunger 5|. engaging with the arm 51 acts to maintain the roller 58 in contact with the edge of disc 32. The body of cam 55 gradually inits rear side edge to its front side edge. I thickness of the cam 55 is such whereby when the cam 55 is shifted in a clockwise direction it will engage with the walls of groove 53 and retract and hold the shifter 52 in retracted positionclear of pin 41, and when it is shifted in a counter-"clockwise direction it will be spaced from the walls of the groove 53 to thereby release the shifter '52 to an extent to permit it to be projected into the path of the beveled corners 49 of pin. 41 whereby the latter will be shifted in a direction to partly extend into cavity 44 and to an extent to thereby provide for the separation of the driver 1 from element A and for the operation of driver 1 independently of the element A.

The cam 55 is arranged to extend above the shifter 52 and acts as a limiting means for the movementfiof the shifter 52 when the latter is'released. The disc' 32 is formed with a cutout 62 in its edge and such cutout provides a clearance for receiving the roller 58 after the bar 34 has had its edge 30 shifted clear of the fiat surface 59 of "shaft 54 The shifting of roller 58 into thecutoutBZ is caused by the action of the spring urged plunger 6| on the arm 51, and such action imparts av counter-clockwise movement on the arm 51 which moves shaft 54 in a like direction, the shaft 55 then moves cam 55 counter-clock wise causing the thinner portion of the latter to permit of the release of-shifter 52 for the purpose aforesaid. A continuation of the operation of the disc 32 will provide for the roller 58 travelling 'on the high part of the edge of disc 32 and which will provide for arm 51 moving clockwise carrying shaft 54 and cam 55 moving in a like direction,iwhereby the latter will coact with the walls of the groove 53 of and retract the shifter 52, as well as releasably latching the latter in retracted position. It is to beunderstood that in the meanwhile, the obstruction has been removed out of the downward path of the foot-piece 35 and the bar 34 returned to the position shown by Figure 1 by the spring 40. When the edge 60 of bar 34 and the face portion 59 of shaft 54 are so related as is shown by Figure '1, their 'coaction not only prevents the shifting of the shaft 54% cam 55 and arm 51 counter-clockwise during the operation of the disc 32, but also the shifting action of the spring urged plunger 6| on arm 51. The action of the spring urged plunger 6| facilitates the counter-clockwise movement of arm 51, cam 55 and shaft 54 when the face part, 59 of shaft 54" clears the edge 60 of bar 34.

The element Ahas secured to its upper end a plate63 arranged in the. path of the driver 1 and coacting with the latter when returning element A to its initial position. The driver -1 has supported on the upper portion of its rear face a roller 54 mounted in a link 65 carried by the pin 3|.

The actuating or driving member 1 and the actuating or-driving head H for the elements A and B respectively normally operatively engage with said elements for reciprocating them. The.

' the shaft 5 i will be arranged in notch 43, whereby the shaft 54 will be moved in a counterclockwise direction carrying the cam 55 in the same direction to permit for the releasing of the shifter 52 in the manner and to an extent as aforesaid. The action of the spring 54, when shifter 52 is released will move shifter 52 into the downward path of the beveled corner 49 of the pin 41, which is carried with element A and as element A moves downwardly the shifter 52 will shift the pin 41 to extend into the cavity 44, pin 41 will then be in a position to break the operative engagement of the actuator I with the element A because actuator I will be free to pass through the groove or cut-out in the pin 41 and the movement of element A from actuator I will be discontinued. Any downward movement of the element A is arrested by the wall 46 of the cavity 44 engaging the pin 41. In the meanwhile, the plunger 20 of the actuating head II strikes the upper end of the element A, which is now locked, moving the plunger upwardly and the latter acts on the pin 24 and shifts it in a direction to provide for it disconnecting the head I I from element B, whereby the head II will travel independently of element 3. The aforesaid operations prevent the completion of the staple forming and driving strokes. On the return stroke of the actuating member I and the actuating head I I, the pins 24 and 41 are shifted in the direction to provide for the operative engagement between the actuators I and I I and the elements A, B respectively. The plate 63 and the lug I3 coact with the actuators to provide for the elements A, B to be restored to their initial positions.

On the lifting of the elements A, B by the coaction of the plate 63 with the actuator I and the lug I3 coacting with the actuator I I, the surface 45 coacts with the beveled corner 48 of the pin 41 and shifts the latter to provide for the operative engagement between the actuator 1 and the element A, and the plunger 20 will be positioned to act on the pin 24 to shift it in a direction to provide for the operative engagement of the head II with the element B.

The roller 58 on arm 5'! always travels on the edge of the disc 32 until it reaches the cut-out 62. If the controller E is in normal position the surface 59 of the shaft 54 bears against the edge of the controller E and will remain in such position until the cut-out 62 and the disc 32 is passed by the roller 58. If an obstruction is present with respect to the controller E, the latter shifts upwardly whereby its edge 60 will clear face part 59 of shaft 54 and the operation as aforesaid will be carried out.

The operating means for reciprocating the actuators I and II is shown by way of example as the links 30, GI driven from the disc 32, but it is to be understood that the said actuators may be reciprocated by any suitable means or method.

With reference to the obstacle interposed in the downward path of the controller E to arrest the movement of the latter, it is to be understood that such term is to imply the hand or fin- :gers of the attendant, a foreign body or anything whatsoever which through some cause is inter-. posed in such downward path to arrest the travel of controller E.

What I claim is:

1. In a safety control, in combination, a reciprocatory staple forming element, a reciprocatory staple driving element, a pair of reciprocatory actuating members for reciprocating said elements, means coacting with said elements to provide for said members normally operatively engaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active end of the staple forming element, and means correlated with the said other means and with the controller and made active, when the latter meets an? obstruction when moving in a direction corresponding to the staple forming and driving strokes of said elements for throwing out the operative engagement between said members and elements to prevent the completion of said strokes without discontinuing the operation of said members.

2. In a safety control, in combination, a reciprocatory staple forming element, a reciprocatory staple driving element, a pair of reciprocatory actuating members for reciprocating said elements, means coacting with said elements to provide for said members normally operatively engaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active end of the staple forming element, and means correlated with the said other means and with the controller and made active, when the latter meets an obstruction when moving in a direction corresponding to the staple forming and driving strokes of said elements for throwing out the operative engagement between said members and elements to prevent the completion of said strokes without discontinuing the operation of said members, the said means coacting with said elements being in the form of a pair of horizontally shiftable pins, one being slidably mounted in the staple forming element and the other being slidably mounted in the staple driving element and being spring controlled.

3. In a safety control, in combination, a reciprocatory staple forming element, a reciprocatory staple driving element, a pair of 'reciprocatory actuating members for reciprocating said elements, means coacting with said elements to provide for said members normally operatively engaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active end of the staple forming elements, and means correlated with the said other means and with the controller and made active, when the latter meets an obstruction when moving in a direction corresponding to the staple forming and driving strokes of said elements for throwing out the operative engagement between said members and elements to prevent the completion of said strokes without discontinuing the operation of said members, said means coacting with said elements being formed of a pair of actuatable horizontally shiftable pins, one being mounted in the staple forming element transversely thereof and having a groove for the passage of the actuating member for the staple forming element and the other being mounted in the staple driving element transversely thereof, being spring controlled and formed with a groove for the passage of the staple driving element when the actuator for the staple driving element is freed from operative connection therewith.

4. In a safety control, in combination, a reciprocatory staple forming element, a reciprocatory staple driving element, a pair of reciprocatory actuating members for reciprocating said elements, means coacting with said elements to provide for said members normally operatively engaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active end of the staple formingelement, and means correlated with the said other means and with the controller and made active, when the latter meets an obstruction when moving in a direction cor responding to the staple forming and driving strokes of said elements for throwing out the operative engagement between said members and elements to prevent the completion of said strokes I without discontinuing the operation of said members, each of said elements and its actuator having coacting interengaging means lengthwise thereof for slidably connecting them together.

5. In a safety control, in combination, a recip-.

actuating members for reciprocating said elements, normally stationary oppositely horizontal-- ly shiftable means carried by and coacting with said elements to provide for said members normally operativelyengaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active end'of the staple forming elements, and means correlated with the said other means and with the controller and made active, when the latter meets an obstruction when moving in a direction corresponding to the staple forming and driving strokes of said elements for throwing out the operative engagement between said membersand elements to prevent the completion of said strokes without discontinuing the operation ofsaid members.

6. In a safety control, in combination, a reciprocatory staple forming element, a reciprocatory staple driving element, a pair of reciprocatory actuating members for reciprocating said elements, normally stationary oppositely horizontally'shiftable means carried by and coacting with said elements to provide for said members normally operatively engaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended-relation with respect to the active end of the staple forming' elements, and means correlated with the said other means and with the controller and made active, when the latter meets an obstruction when moving in a direction corresponding to the staple forming and driving strokes of said elements for throwing out the operative engagement between said members and elements to prevent the completion of said strokes without discontinuing the operation of said members, the said normally stationary horizontally shiftable means being grooved to provide, when shifted horizontally in one direction clearances providing for the throwing out of the said operative driving engagement between said members and elements.

'7. In a safety control, in combination, a reciprocatory staple forming element, a reciprocatory staple driving element, a pair of reciprocatory actuating members for reciprocating said elements, means coacting with said elements to provide for said members normally operatively engaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active end of the staple forming elements, and means correlated with the said other means and with the controller and made active, when the latter meets an obstruction when moving in a direction corresponding to the staple forming and driving-strokes of said elements for throwing out the operative engagement between said members and elements to prevent the completion of said strokes without discontinuing the operation of said members, the said means coacting with said elements being in the form of a pair" ofhorizontally shiftable pins, one being X slidably mounted in the staple forming element and the other being slidably mounted in the staple driving element and being spring con trolled, the said second mentioned means ineluding a normally stationary slidable partmounted in the actuating member for the staple driving element, operated from the staple forming element and formed with a latching means for the pin mounted in the staple driving element when such pin is shifted to throw out the operative driving engagement between the staple driving element and its actuating member.

8. In a safety control, in combination, a redirection correspondingto the staple forming and driving strokes of said elements for throwing out the operative engagement between said members and elements to prevent the completion of said strokes without discontinuing the operation of said members, the said means coacting with said elements being in the formof a pair of hori- 1 zontally shiftable pins, one being slidablymount ed in the staple forming element and the other being sli-dably mounted in the staple driving element and being spring controlled, the said second mentioned means including a normally latched spring controlled shifter, adapted when ciprocatory staple forming element, a reciproca tory staple driving element, a] pair of reciproca-v released for moving the pin carried by the staple forming element to throw out the operative driving engagement between the staple forming element and its actuating member and a combined latching, releasing and limiting structure for said shifter.

9. In a safety control, in combination, a reciprocatory staple forming element, a reciprocatory staple driving element, a pair of reciprocatory actuating members for reciprocating said elements, means coacting with said elements to provide for said members normally operatively engaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active'end of the staple forming element, means correlated with the said other means and with the controller and made active, when the latter.

meets an obstruction when moving in a direction corresponding to the staple forming and driving strokes of said elements for throwing out the operative engagement between said members and elements toprevent the completion of said strokes actuating member, and said staple driving ele-- ment being provided with means coacting with its "actuating member and said second mentioned means correlated with the controller for restoring the operative drive connection between the staple driving element and its actuator.

10. In a safety control, in c0mbination,.'arecipro'catory staple forming element, a reciprocatory' staple driving element, a pair of reciprocatory actuating members for reciprocating said elements, means coacting with said elements to provide for said members normally operatively engaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active end of the staple forming element, means correlated with the said other means and with the controller and made active, when the latter being slidably mounted in the staple driving element and "being spring controlled, said staple forming element being provided wtih means coacting with its actuating member and the said second mentioned means correlated with the controller for restoring the operative drive connection between such element and its actuating member, and said staple driving element being provided with means coacting with its actuating member and said second mentioned means correlated with the controller for restoring the operative drive connection between the staple driving element and its actuator.

11. In a safety control, in combination, a reciprocatory staple forming element, a reciprocatory staple driving element, a pair of reciprocatory actuating members for reciprocating said elements, means coacting with said elements to provide for said members normally operatively engaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active end of the staple forming elements, means correlated with the said other means and with the controller and made active, when the latter meets an obstruction when moving in a direction corresponding to the staple forming and driving strokes of said elements for throwing out the operative engagement between said members and elements to prevent the completion of said strokes without discontinuing the operation of said members, said means coacting with said elements being formed of a pair of actuable horizontally shiftable pins, one being mounted in the staple forming element transversely thereof and having a groove for the passage of the actuating member for the staple forming element and the other being mounted in the staple driving element transversely thereof, being spring controlled and formed with a groove for the passage of the staple driving element when the actuator for the staple driving element is free from operative connection therewith, said staple forming element being provided with means coacting with its actuating member and the said second mentioned means correlated with the controller for restoring the operative drive connection between such element and its actuating member, and said staple driving element being provided with means coacting with its actuating member and said second mentioned means correlated with the controller for restoring the operative drive connection between the staple driving element and its actuator,

12. In a safety control, in combination, a reciprocatory staple forming element, a reciprocatory staple driving element, a pair of reciprocatory actuating members for reciprocating said elements, means coacting with said elements to provide for said members normally operatively engaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active end of the staple forming element, means correlated with the said other means and with the controller and made active, when the latter meets an obstruction when moving in a direction corresponding to the staple forming and driving strokes of said elements for throwing out the operative engagement between said members and elements to prevent the completion of said strokes Without discontinuing the operation of said members, each of said elements and its actuator having coacting interengaging means disposed lengthwise thereof for slidably connecting them together, said staple forming element being provided with means coacting with its actuating member and the said second mentioned means correlated with the controller for restoring the operative drive connection between such element and its actuating member, and said staple driving element being provided with means coacting with its actuating member and said second mentioned means correlated with the controller for restoring the operative drive connection between the staple driving element and its actuator.

13. In a safety control, in combination, a reciprocatory staple forming element, a reciprocatory staple driving element, a pair of reciprocatory actuating members for reciprocating said elements, normally stationary oppositely horizontally shiftable means carried by and coacting with said elements to provide for said members normally operatively engaging with said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active end of the staple forming elements, means correlated with the said other means and with the controller and made active, when the latter meets an obstruction when moving in a direction corresponding to the staple forming and driving strokes of said elements for throwing out the operative engagement between said members and elements to prevent the completion of said strokes without discontinuing the operation of said members, said staple forming element being provided with means coacting with its actuating member and the said second mentioned means correlated with the controller for restoring the operative drive connection between such element and its actuating member, and said staple driving element being provided with means coacting with its actuating member and said second mentioned means correlated with the controller for restoring the operative drive connection between the staple driving element and its actuator.

14. In a safety control, in combination, a reciprocatory staple forming element, a reciprocatory staple driving element, a pair of reciprocatory actuating members for reciprocating said elements, normally stationary oppositely horizontally shiitable means carried by and coacting with said elements to provide for said members normally operatively engaging With said elements for reciprocating them, a controller bodily carried with and disposed in extended relation with respect to the active end of the staple forming elements, means correlated with the said other means and with the controller and made active,

pletion of said strokes without discontinuing the operation of said members, the said normally stationary horizontally shiftable means being grooved to provide, when'shifted horizontally in one direction clearances providing for the throwing out of said operative driving engagement between said members and elements, said staple forming element being providedwith means c0- acting with its actuating memberand the said secondmentioned means correlated with the controller for restoring the operative drive connection between such' element and its actuating i member, and said staple driving element being provided with means coasting with its actuating member and'said-second mentioned means correlated with the controller for restoring the operative drive connection between the staple driving element and its actuator! .7

ARNOLD FERDINAND FISCHER. 

